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Timiriasevia
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Podocopina
Superfamily:
Cytheracea
Family:
Cytheracea - Family uncertain
Formal Genus Name and Reference:
Timiriasevia MANDELSTAM, 1947
Type Species:
T. epidermiformis
Images
(Click to enlarge in a new window)
Fig. 276,2. *T. epidermiformis, M.Jur., SW.Asia, 2a,b, RV lat., RV muscle field, X43, X56 (237), 2c,d, RV and LV hinge, X43 (50). -- Fig. 275, 6. T. polymorpha Mandelstam, L.Cret., SW.Asia, 6a-c, female carapace L, R, dors., X ? (50). -- Fig. 274,3. T. acuta Mandelstam, L.Cret., SW.Asia, 3a-c, ?male carapace L, R, dors., X ? (50).
Synonyms
Geographic Distribution
Eu.-Asia (USSR)
Age Range
Beginning Stage in Treatise Usage:
M.Jur.
Beginning International Stage:
Aalenian
Fraction Up In Beginning Stage:
0
Beginning Date:
174.7
Ending Stage in Treatise Usage:
L.Cret.
Ending International Stage:
Albian
Fraction Up In Ending Stage:
100
Ending Date:
100.5
Description
Carapace roughly kidney-shaped, LV larger than RV, in some species anterior and posterior ends almost equally rounded, but anterior always more broadly rounded than posterior, dorsal margin almost straight to convex, ventral margin weakly convex in anterior third; surface with fine pits, small ribs, or irregular spines (placed usually in a row parallel to anu at a short distance from anterior anu posterior margins, or dorsocentrally). Zone of concrescence with only a few radial pore canals; inner margin and line of concrescence coincident; no eye spot; RV hinge proviued with smooth median furrow and e1ongateu terminal tooth plates; muscle scars in row of 4 adu uctors with 2 manuibular scars in front. Strong sexual uimorphism, inferred female carapaces being strongly swollen in posterior third. Very like Metacypris (syn. Gomphocythere) in general features but with different hinge. [Freshwater.]
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Podocopina
Superfamily:
Cytheracea
Family:
Cytheracea - Family uncertain
Formal Genus Name and Reference:
Timiriasevia MANDELSTAM, 1947
Type Species:
T. epidermiformis
Images
(Click to enlarge in a new window)
Fig. 276,2. *T. epidermiformis, M.Jur., SW.Asia, 2a,b, RV lat., RV muscle field, X43, X56 (237), 2c,d, RV and LV hinge, X43 (50). -- Fig. 275, 6. T. polymorpha Mandelstam, L.Cret., SW.Asia, 6a-c, female carapace L, R, dors., X ? (50). -- Fig. 274,3. T. acuta Mandelstam, L.Cret., SW.Asia, 3a-c, ?male carapace L, R, dors., X ? (50).
Synonyms
Geographic Distribution
Eu.-Asia (USSR)
Age Range
Beginning Stage in Treatise Usage:
M.Jur.
Beginning International Stage:
Aalenian
Fraction Up In Beginning Stage:
0
Beginning Date:
174.7
Ending Stage in Treatise Usage:
L.Cret.
Ending International Stage:
Albian
Fraction Up In Ending Stage:
100
Ending Date:
100.5
Description
Carapace roughly kidney-shaped, LV larger than RV, in some species anterior and posterior ends almost equally rounded, but anterior always more broadly rounded than posterior, dorsal margin almost straight to convex, ventral margin weakly convex in anterior third; surface with fine pits, small ribs, or irregular spines (placed usually in a row parallel to anu at a short distance from anterior anu posterior margins, or dorsocentrally). Zone of concrescence with only a few radial pore canals; inner margin and line of concrescence coincident; no eye spot; RV hinge proviued with smooth median furrow and e1ongateu terminal tooth plates; muscle scars in row of 4 adu uctors with 2 manuibular scars in front. Strong sexual uimorphism, inferred female carapaces being strongly swollen in posterior third. Very like Metacypris (syn. Gomphocythere) in general features but with different hinge. [Freshwater.]